| Starter | Tm | Tier | Game |
|---|---|---|---|
| Justin Verlander | DET | 7.37 | 201304250_KCA_DET |
| Cliff Lee | PHI | 5.11 | 201304250_PIT_PHI |
| James Shields | KCA | 3.38 | 201304250_KCA_DET |
| Hiroki Kuroda | NYA | 3.29 | 201304250_TOR_NYA |
| Jordan Zimmermann | WAS | 2.92 | 201304260_CIN_WAS |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jonathan Sanchez | PIT | -3.62 | 201304260_PIT_SLN |
| Edinson Volquez | SDN | -3.55 | 201304240_MIL_SDN |
| Roberto Hernandez | TBA | -1.88 | 201304260_TBA_CHA |
| Philip Humber | HOU | -1.66 | 201304250_HOU_BOS |
| Tyler Chatwood | COL | -1.37 | 201304240_ATL_COL |
Based on accumulated WAA for this season up to 2013-04-26.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 2.34 | Clay Buchholz | 37.7 | BOS |
| +004+ | 1.9 | Matt Harvey | 35 | NYN |
| +005+ | 1.85 | Anibal Sanchez | 33.7 | DET |
| +008+ | 1.76 | Matt Moore | 26 | TBA |
| +010+ | 1.69 | Yu Darvish | 32.7 | TEX |
| +013+ | 1.64 | Adam Wainwright | 37.3 | SLN |
| +014+ | 1.61 | Justin Masterson | 34 | CLE |
| +016+ | 1.59 | Carlos Villanueva | 29.3 | CHN |
| +019+ | 1.56 | Jordan Zimmermann | 36 | WAS |
| +020+ | 1.54 | Madison Bumgarner | 33.7 | SFN |
| +022+ | 1.5 | Ross Detwiler | 26 | WAS |
| +023+ | 1.47 | Alex Cobb | 29.7 | TBA |
| +024+ | 1.43 | Felix Hernandez | 34.7 | SEA |
| +028+ | 1.39 | Clayton Kershaw | 33.7 | LAN |
| +029+ | 1.38 | Shelby Miller | 25 | SLN |
| +030+ | 1.37 | Hisashi Iwakuma | 31.7 | SEA |
| +032+ | 1.31 | Justin Verlander | 32.3 | DET |
| +033+ | 1.3 | Jake Westbrook | 21.7 | SLN |
| XXXXX | 1.21 | Kyle Kendrick | 33.7 | PHI |
| XXXXX | 1.19 | Patrick Corbin | 26.3 | ARI |
| XXXXX | 1.19 | Mike Minor | 25 | ATL |
| XXXXX | 1.18 | Mat Latos | 33.3 | CIN |
| XXXXX | 1.17 | Jon Lester | 31.7 | BOS |
| XXXXX | 1.15 | Wandy Rodriguez | 21.7 | PIT |
| XXXXX | 1.08 | Travis Wood | 26 | CHN |
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